diff --git a/.github/workflows/docker-build.yml b/.github/workflows/docker-build.yml
index 5d41958d..1dc90c7a 100644
--- a/.github/workflows/docker-build.yml
+++ b/.github/workflows/docker-build.yml
@@ -423,7 +423,7 @@ jobs:
       # Install Cosign for keyless signing
       - name: Install Cosign
         if: github.event_name != 'pull_request' && steps.skip.outputs.skip_build != 'true' && steps.skip.outputs.is_feature_push != 'true'
-        uses: sigstore/cosign-installer@d7d6bc7722e3daa8354c50bcb52f4837da5e9b6a # v3.8.1
+        uses: sigstore/cosign-installer@faadad0cce49287aee09b3a48701e75088a2c6ad # v4.0.0
 
       # Sign GHCR image with keyless signing (Sigstore/Fulcio)
       - name: Sign GHCR Image
diff --git a/.github/workflows/nightly-build.yml b/.github/workflows/nightly-build.yml
index 50e771a5..74dee196 100644
--- a/.github/workflows/nightly-build.yml
+++ b/.github/workflows/nightly-build.yml
@@ -154,7 +154,7 @@ jobs:
 
       # Install Cosign for keyless signing
       - name: Install Cosign
-        uses: sigstore/cosign-installer@d7d6bc7722e3daa8354c50bcb52f4837da5e9b6a  # v3.8.1
+        uses: sigstore/cosign-installer@faadad0cce49287aee09b3a48701e75088a2c6ad  # v4.0.0
 
       # Sign GHCR image with keyless signing (Sigstore/Fulcio)
       - name: Sign GHCR Image